Phyllis Sabo of Houston waits in the rain to see her son, Ed Sabo, run past on Studewood near White Oak during the Chevron Houston Marathon and Aramco Houston Half Marathon Sunday, Jan. 13, 2013, in Houston.

Phyllis Sabo of Houston waits in the rain to see her son, Ed Sabo, run past on Studewood near White Oak during the Chevron Houston Marathon and Aramco Houston Half Marathon Sunday, Jan. 13, 2013, in Houston.

Photo: Melissa Phillip, Houston Chronicle

Phyllis Sabo of Houston waits in the rain to see her son, Ed Sabo,... Photo-4026144.55046 - Houston Chronicle

Patricia Donatti, left, and David Salinas, right, thrust their arms in the air as they near the finish line of the ABB 5K race during the Houston Marathon race weekend Saturday, Jan. 12, 2013, in Houston.

Patricia Donatti, left, and David Salinas, right, thrust their arms in the air as they near the finish line of the ABB 5K race during the Houston Marathon race weekend Saturday, Jan. 12, 2013, in Houston.

Carolina Cutrera, left, Monica Cutrera, center, and Roberton Cutrera, right, run hand in hand as they near the finish line of the ABB 5K race during the Houston Marathon race weekend Saturday, Jan. 12, 2013, in Houston. less

Carolina Cutrera, left, Monica Cutrera, center, and Roberton Cutrera, right, run hand in hand as they near the finish line of the ABB 5K race during the Houston Marathon race weekend Saturday, Jan. 12, 2013, in ... more

Rebekah Palaian with the Ironman Sports Medicine Institute at Memorial Hermann gives Crawford Gallien a massage as he prepares to run his third half-marathon on Sunday, during the Chevron Houston Marathon Expo at the George R. Brown Convention Center Saturday, Jan. 12, 2013, in Houston. less

Rebekah Palaian with the Ironman Sports Medicine Institute at Memorial Hermann gives Crawford Gallien a massage as he prepares to run his third half-marathon on Sunday, during the Chevron Houston Marathon Expo ... more